This thesis is divided into four sections. The first chapter deals with Mamlūk historiography and its major characteristics, alongside an examination of the life al' Aynī's, who was one of the most prominent historians of the period. Special attention is paid to his professions, masters, students as well as his numerous works. Chapter two, on the other hand, focuses on the copies of 'Iqd al-jumān fi tārīkh ahl al-zamān, mentioning the published volumes that covered most of the Ayyūbid and Mamlūk eras. The rest of this chapter deals with the methodology used in the edition of Volume eleven (431-520/1040-1126) as well as demonstrating its importance and sources. Chapter three presents an edition of the Arabic text of Volume eleven. Chapter four is a separate volume, which initially deals with the life and works of the historian Muḥammad b. 'Abd al-Malik al-Hamadhānī. The rest of chapter examines the historical fragments from his lost historical book, called 'Unwān al-siyar fī maḥāsin ahl al-Badū wa'-l Ḥaḍr, also known as Al-Ma'ārif al-muta'akhkhira: these fragments are to be found in Volume eleven of the 'Iqd al-jumān. At the end of this chapter, the Arabic text is reconstructed and its biographical materials, are reorganised in alphabetical order.